Bimetallic Doped RuO<sub>2</sub> with Manganese and
Iron as Electrocatalysts for Favorable Oxygen Evolution Reaction PerformanceWuYiyiTariqMuhammadZamanWaqas QamarSunWeiZhouZhenhuaYangJi2020Synthesizing oxygen evolution reaction
(OER) catalysts with enhanced
activity by codoping has been proven to be a feasible approach for
the efficient use of noble metals via renewing their basic intrinsic
properties. In continuation of the research in codoping, we prepare
a ruthenium-based bimetallic doped catalyst Mn<i><sub>x</sub></i>Fe<i><sub>y</sub></i>Ru<sub>1–<i>x</i>–<i>y</i></sub>O<sub>2</sub> with an outstanding
OER activity as compared to pure RuO<sub>2</sub>, one of the state-of-the-art
OER catalysts. The synthesized codoped RuO<sub>2</sub> with a Mn/Fe
molar ratio of 1 reflected a Tafel slope of only 41 mV dec<sup>–1</sup>, which is appreciably lower than 64 mV dec<sup>–1</sup> for
pure RuO<sub>2</sub>. The X-ray photoelectron spectroscopy (XPS) performed
reveals that oxygen vacancy and manganese valency are the key factors
of the OER activity for codoped catalysts.